Dearest Monks,

I am humbled once again.

I am about to undertake a daunting task ... multiple object identification and decoding within an image (e.g., JPEG). Screwy out of the box programs don't work for my application ... and I wanted to try to do it myself anyways.

First I need to have an two-dimensional array that will contain the row/column pixel intensity data from the image. Just intensity, not color.

How can I do this so that I can call $pixel[20][450] and get the pixel intensity in row 20, column 450 (and for every other pixel in the image)?

Or where should I start?

Chris

In reply to Convert JPEG to pixel intensity array by cdherold

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.